ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  pnfnre Unicode version

Theorem pnfnre 8220
Description: Plus infinity is not a real number. (Contributed by NM, 13-Oct-2005.)
Assertion
Ref Expression
pnfnre  |- +oo  e/  RR

Proof of Theorem pnfnre
StepHypRef Expression
1 cnex 8155 . . . . . 6  |-  CC  e.  _V
21uniex 4534 . . . . 5  |-  U. CC  e.  _V
3 pwuninel2 6447 . . . . 5  |-  ( U. CC  e.  _V  ->  -.  ~P U. CC  e.  CC )
42, 3ax-mp 5 . . . 4  |-  -.  ~P U. CC  e.  CC
5 df-pnf 8215 . . . . 5  |- +oo  =  ~P U. CC
65eleq1i 2297 . . . 4  |-  ( +oo  e.  CC  <->  ~P U. CC  e.  CC )
74, 6mtbir 677 . . 3  |-  -. +oo  e.  CC
8 recn 8164 . . 3  |-  ( +oo  e.  RR  -> +oo  e.  CC )
97, 8mto 668 . 2  |-  -. +oo  e.  RR
109nelir 2500 1  |- +oo  e/  RR
Colors of variables: wff set class
Syntax hints:   -. wn 3    e. wcel 2202    e/ wnel 2497   _Vcvv 2802   ~Pcpw 3652   U.cuni 3893   CCcc 8029   RRcr 8030   +oocpnf 8210
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-un 4530  ax-cnex 8122  ax-resscn 8123
This theorem depends on definitions:  df-bi 117  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-nel 2498  df-rex 2516  df-rab 2519  df-v 2804  df-in 3206  df-ss 3213  df-pw 3654  df-uni 3894  df-pnf 8215
This theorem is referenced by:  renepnf  8226  nn0nepnf  9472  xrltnr  10013  pnfnlt  10021  xnn0lenn0nn0  10099  inftonninf  10703  pcgcd1  12900  pc2dvds  12902
  Copyright terms: Public domain W3C validator